I know most of you guys are Denon crazy but I have just noticed that my SONY STRDB1070 seems to be able to read THX 5.1 EX ! In the THX set up section in Episode 1 the test tone sends a noise to the Surround Rear and the 1070 is sending it out perfectly. (In 'Normal Surround' setting with 6.1 selected). I expected it to down-mix to standard 5.1 and have the noise coming from SL & SR - but no. Also in the next section (phase) it speicifically notes that in a non EX system the noise will go to the SL & SR, but my system goes directly to the SB. Now this is great - but Sony don't claim EX compatibility with this unit ! Am I getting this all wrong ? Is it EX playing or some sort of Sony's DCS doing this ? Can anybody explain what is going on please ? Can any 1070 owners check DTS discrete 6.1 disks (I dont have one) to see if the same thing happens ?